1 files changed, 145 insertions, 0 deletions
diff --git a/src/util/paper.cpp b/src/util/paper.cpp
new file mode 100644
index 0000000..3a3efe2
--- /dev/null
+++ b/src/util/paper.cpp
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Inkscape PaperSize
+ *
+ * Authors:
+ *      Bob Jamison (2006)
+ *      Martin Owens (2021)
+ *
+ * Copyright (C) 2021 AUTHORS
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <glibmm/i18n.h>
+
+#include "paper.h"
+#include "pages-skeleton.h"
+
+#include "io/resource.h"
+
+namespace Inkscape {
+
+/**
+ * Returns a list of page sizes.
+ */ 
+const std::vector<PaperSize>& PaperSize::getPageSizes()
+{   
+    // Static makes us only load pages once.
+    static std::vector<PaperSize> ret;
+    if (!ret.empty())
+        return ret;
+    
+    char *path = Inkscape::IO::Resource::profile_path("pages.csv");
+    if (!g_file_test(path, G_FILE_TEST_EXISTS)) {
+        if (!g_file_set_contents(path, pages_skeleton, -1, nullptr)) {
+            g_warning("%s", _("Failed to create the page file."));
+        }
+    }   
+    gchar *content = nullptr;
+    if (g_file_get_contents(path, &content, nullptr, nullptr)) {
+        gchar **lines = g_strsplit_set(content, "\n", 0); 
+    
+        for (int i = 0; lines && lines[i]; ++i) {
+            gchar **line = g_strsplit_set(lines[i], ",", 5);
+            if (!line[0] || !line[1] || !line[2] || !line[3] || line[0][0]=='#') 
+                continue;
+    
+            //name, width, height, unit
+            double width = g_ascii_strtod(line[1], nullptr);
+            double height = g_ascii_strtod(line[2], nullptr);
+            g_strstrip(line[0]);
+            g_strstrip(line[3]);
+            Glib::ustring name = line[0];
+            ret.push_back(PaperSize(name, width, height, Inkscape::Util::unit_table.getUnit(line[3])));
+        }
+        g_strfreev(lines); 
+        g_free(content);
+    }   
+    g_free(path);
+    return ret;
+}   
+
+
+PaperSize::PaperSize()
+    : name("")
+    , width(0.0)
+    , height(0.0)
+{
+    unit = Inkscape::Util::unit_table.getUnit("px");
+}
+
+
+PaperSize::PaperSize(std::string name, double width, double height, Inkscape::Util::Unit const *unit)
+    : name(std::move(name))
+    , width(width)
+    , height(height)
+    , unit(unit) 
+{}
+
+std::string PaperSize::getDescription(bool landscape) const {
+    return toDescription(name, size[landscape], size[!landscape], unit);
+}
+
+std::string PaperSize::toDescription(std::string name, double x, double y, Inkscape::Util::Unit const *unit)
+{
+    return name + " (" + formatNumber(x) + " x " + formatNumber(y) + " " + unit->abbr + ")";
+}
+
+std::string PaperSize::formatNumber(double val)
+{
+    char buf[20];
+    snprintf(buf, 19, "%0.1f", val);
+    auto ret = std::string(buf);
+    // C++ doesn't provide a good number formatting control, so hack off trailing zeros.
+    if ((ret.length() > 2) && (ret.back() == '0')) {
+        ret = ret.substr(0, ret.length() - 2);
+    }
+    return ret;
+}
+
+void PaperSize::assign(const PaperSize &other)
+{
+    name = other.name;
+    width = other.width;
+    height = other.height;
+    auto [smaller, larger] = std::minmax(width, height);
+    size = Geom::Point(smaller, larger);
+    unit = other.unit;
+}
+
+/**
+ * Returns a matching paper size, if possible.
+ */
+const PaperSize *PaperSize::findPaperSize(double width, double height, Inkscape::Util::Unit const *unit)
+{
+    auto [smaller, larger] = std::minmax(width, height);
+    auto size = Geom::Point(smaller, larger);
+    auto px = Inkscape::Util::unit_table.getUnit("px");
+
+    for (auto&& page_size : Inkscape::PaperSize::getPageSizes()) {
+        auto cmp = Geom::Point(
+            unit->convert(size[0], page_size.unit),
+            unit->convert(size[1], page_size.unit)
+        );
+        // We want a half a pixel tollerance to catch floating point errors
+        auto tollerance = px->convert(0.5, page_size.unit);
+        if (Geom::are_near(page_size.size, cmp, tollerance)) {
+            return &page_size;
+        }
+    }
+    return nullptr;
+}
+
+} // namespace Inkscape
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :